Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79ae1c131ff47ef…

MALICIOUS

PDF

73.3 KB Created: 2020-12-26 02:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2e55b6ef6c0a64929dd0794c4470370 SHA-1: bd6033ad74599408071c83c249566d77b49b861d SHA-256: b79ae1c131ff47efeae2d886251a12aa3b7251546ee41a7e182bbeb7a2f52be9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary malicious URL identified is traffking.ru, which is likely part of a campaign to redirect users to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/strik?utm_term=panda+jumpers+uk
    • https://cdn-cms.f-static.net/uploads/4471085/normal_5fdbb67b66d34.pdf
    • https://xuvagava.weebly.com/uploads/1/3/4/8/134879605/1390533.pdf
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fb7f82970653.pdf
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5fe0cbfbc551f.pdf
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fb87370bfc3f.pdf
    • https://zukolipiniroti.weebly.com/uploads/1/3/4/4/134494738/kadiveli.pdf
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5fcc4d9c3a8bf.pdf
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fd0673e82112.pdf
    • https://govasosu.weebly.com/uploads/1/3/4/5/134519533/7242317.pdf
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/99f0957bec96.pdf
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5fbf39e51d971.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/98a308d8-6875-4573-beec-f8fae4ca4b8d/30641953650.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d621.bin
c12bb3c24b61023c3699ad3458377425c447ede9bf202456880b581d38bcaf91
pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 4860 bytes
font_01_sfnt_off0000e679.bin
a985853cf5e7143f94a326ca84d54dd1a6e2bc01e59e3f0ae26d25c27bfa7b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE679 10468 bytes
font_02_sfnt_off00010a52.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 4324 bytes